Make the clang module container format selectable from the command line.

- introduces a new cc1 option -fmodule-format=[raw,obj]
  with 'raw' being the default
- supports arbitrary module container formats that libclang is agnostic to
- adds the format to the module hash to avoid collisions
- splits the old PCHContainerOperations into PCHContainerWriter and
  a PCHContainerReader.

Thanks to Richard Smith for reviewing this patch!

llvm-svn: 242499

1 files changed, 6 insertions, 2 deletions

diff --git a/clang/tools/driver/cc1_main.cpp b/clang/tools/driver/cc1_main.cpp
index 65f845ddc45..8240561236b 100644
--- a/clang/tools/driver/cc1_main.cpp
+++ b/clang/tools/driver/cc1_main.cpp
@@ -65,10 +65,14 @@ void initializePollyPasses(llvm::PassRegistry &Registry);
 #endif
 
 int cc1_main(ArrayRef<const char *> Argv, const char *Argv0, void *MainAddr) {
-  std::unique_ptr<CompilerInstance> Clang(new CompilerInstance(
-      std::make_shared<ObjectFilePCHContainerOperations>()));
+  std::unique_ptr<CompilerInstance> Clang(new CompilerInstance());
   IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
 
+  // Register the support for object-file-wrapped Clang modules.
+  auto PCHOps = Clang->getPCHContainerOperations();
+  PCHOps->registerWriter(llvm::make_unique<ObjectFilePCHContainerWriter>());
+  PCHOps->registerReader(llvm::make_unique<ObjectFilePCHContainerReader>());
+
   // Initialize targets first, so that --version shows registered targets.
   llvm::InitializeAllTargets();
   llvm::InitializeAllTargetMCs();